Thus far a dirty bomb of Radioactive Materials. Isil has used chemical weapons, including mustard gas in syria and iraq. There is no doubt that if these madmen ever got their hands on a nuclear bomb or Nuclear Material, they most certainly would use it to kill as many innocent people as possible. President obama also attended a p5 plus 1 group which hammered out the nuclear deal. This group, that doesnt agree on all aspects of policy does agree on is that this deal has achieved a substantial success. This deal does remind us that when the International Community stands as one, we can advance our common security. Here is what well see in the coming moments. The president will give an opening statement, but take live press questions, and many expect some about donald trump. Among other things, he told the New York Times, he would be open to japan rather than do for many years, umbrella for protection. Trump also raised eyebrows by talking about nuclear strikes in that interview with mmsnbcs Chris Matthews. I would be the last one to use the nuclear weapon. Can you tell the middle east you i would never say that. How about europe . Im not going to take it off the table. You will use it in europe . No, i dont think so. Im just saying. I am not taking cards off the table. Joining us now for our special coverage is the host of hardball, Chris Matthews, as well as msnbc contributor, chris, your thoughts as we await the president s remarks. Of course what he said to Anderson Cooper the other night and what he said to me are troubling. President s are careful about what they say about Nuclear Weapons. Almost a religious sense. You dont talk about when you use them, when you wont use them. The world hasnt used them hiroshima. The attack of Nuclear Weapons, tactical weapons, tens of kilo tons. So you dont talk about it. The idea of i think saying i dont want to take it offer the table. That sounds like its in your arsenal of possible options. It doesnt sound right to people in the middle east, europe. Theyre close spaces. If you drop a bomb any where in the middle east, if you do it in europe, it hits europe. No way to isolate it as some sort of bullet. It isnt that kind of a weapon. It is an environmental weapon forever basically. So i think its something you dont talk about it, and he did. Chris, what youre referencing as well is something that diplomats and military experts talk about a lot. There are boundaries to how u. S. Personnel and the commander and chief or would be commander in chief discuss certain scenarios, so thats really wellknown. And those of us who interview candidates know about that as well. Donald trump either doesnt know or doesnt care which is the larger question this week, do you think donald trump knows what he doesnt know . Well, i think nobody knows everything. Obviously donald trump is a very smart man. He knows a lot of about a lot of things. I think maybe his ability, this is just in twugs, but the ability to think on his feet, he puts a lot of confidence on his ability to answer any question. The trouble is, there are areas of discussion where even the discussion of them causes trouble. Because theyre so sensitive. Thats why politicians who are used to the business of politics, develop a trade craft, just like journalists develop a trade craft, they get information, do certain things to get the information. Politicians learn how to evade certain discussions, and they do. They dont talk about a lot of these things, certainly with regard to Nuclear Weapons. I think about it a lot. Back in the cuban missile crisis, close as it came to a Nuclear Exchange strategic weapons, kennedy would Say Something about how if cuba send ans intermediate range into new york city, for example, there will be a full u. S. Response, even then the word was response. He didnt say ill bomb you with Nuclear Weapons. Its care that is always used when speaking of Nuclear Weapons. Bringing in Steve Clemmons here, what we expect to hear from the president , who im told will be out within moments, he is capping what is an Important Group meeting, as we mentioned with the notable absence of russia, the rich uranium, but when you look at what the president is doing, working off an amendment of 1987 nuclear convention, all about the physical control and logistics of this dangerous material. Walk us through what is at stake here and what the administration is trying to do. Our nation essentially defined its most important Foreign Policy around Nuclear Weapons and its competition with the soviet union. The attentiveness, have slowly eroded, and what president obama is trying to resurrect, how to manage materials that go into Nuclear Weapons and Nuclear Materials and the basic Building Blocks of that which can be hijacked and stolen and trafficked in, and that can create an enormous set of problems, but to raise the concern where you continue to have responsible governs. Nuclear weapons have fallen off the radar screen. The statement he just put out, he ended that with isis, in looking at what bad Terror Networks want to do with Nuclear Weapons and how they want to reconnect with what really is, you know, an ongoing legacy effect of the old cold quar. Thats what he is basically trying to focus eyeballs on and get us worried about. We do know up to this point today, the administration has been very clear about the fact that the United States basically has been going in the right direction, going from 740 metric tons of enriched uranium, dropping it down to 585. You see it there. These are numbers theyve been putting out by the white house. But theyre confirmed, and they reflect what they say is progress. Yet Chris Matthews, were getting a one minute warning here, how does the president address the fact that the other big player is mia . Well, he might remind us all of Ronald Reagans dream of getting rid of all Nuclear Weapons. Reagan was considered a hawk, i dont think he was, but whatever his ideology, definitely do what we can to absolutely eliminate humanly, all human chance of a use of the nuclear weapon. We dont want to ever, ever, ever have them used again in 19456789 weve got to deal with russia, though, and that is called dip see. Were going to have to do it. Here he is. Well listen to the president s remarks. I want to begin by thanking the people of washington, d. C. For hosting us, for putting up with more than 50 motorcades. I will make one promise to the people of the city, i will not hold another one in another six years. I want to thank everyone who participated in our meetings. More than 50 leaders from every region of the world, and Key International organizations. At our previous summits, we didnt just come here to talk, but came here to act. I know that the very technical nature of Nuclear Security doesnt always make for flashy headlines, but over the past six years, we have made significant meaningful progress in securing the worlds Nuclear Material so that it never falls into the hands of terrorists. I want to take a few moments to step back and layout exactly what we have accomplished. Together, we have removed the worlds most deadly materials from Nuclear Facilities around the world. With japans announcement today, weve now removed or secured all the highly enriched uranium and plutonium from more than 30 countries. More than 3. 8 tons, which is more than enough to create 150 Nuclear Weapons. Thats material that will never fall into the hands of terrorists. 14 nations, and taiwan, countries as diverse as argentina and chile, libya, turkey, serbia and vietnam have now rid themselves entirely of highly enriched uranium and plutonium. Successfully removing all of ukraines highly enriched uranium menlant was made not ev more danger by the presence of these materials. As of today, south america, an entire continent is completely free of these dangerous materials. When poland completes its row mofl this year, Central Europe will be free of them as well. When indonesia completes its work this year, so will southeast asia. In other words, as terrorists and criminal gangs and arms merchants look around for a nuclear device, vast regions of the world areow offlimits. Thats a remarkable achievement. Weve made important progress in the United States as well. In addition to new steps i announced this morning, weve improved Nuclear Security an training. Weve consolidated Nuclear Materials at fewer facilities, eliminated some 138 tons of our surplus highly enriched uranium, which would be enough for 5,500 Nuclear Weapons. Working with russia, were on track to eliminate enough russian enriched uranium for 20,000 Nuclear Weapons, which were converting to electricity here in the United States. More specifically, as a result of these summits, every single one of the more than 50 nations represented here have taken concrete steps to enhance security at their Nuclear Facilities and storage sites, and that includes improved physical security, stronger regulations, abiding by international guidelines, Greater Transparency and that includes International Peer reviews. 15 new centers have been created around the world for technology and training to share best practices. As part of our work today, we agreed to keep strengthening against cyber attacks. We bolstered International Efforts for International Signal smuggling. It has grown to more than 100 nations, including regular exercises to improve the collective ability to interdict shipments. The United States and 36 partner countries, Radiation Detection equipment at more than 300 International Border crossings, airports, and new mobile detection systems as well. Finally, as i noted this morning, weve strengthened the treeties for so many of our efforts. Especially our team whose have worked tirelessly for years, con can take enormous pride in the achievements. Nevertheless, as i said earlier, our work is by no means finished. There is still a great deal of Radioactive Material around are the world that needs to be secured. Global stocks of blue plutonium growing. Greater risk ever theft, and as a consequence, one of the central goals of this summit was how do we build on the work that has been done so that we have an International Architecture that can continue the efforts, even though this is the last formal leader summit. So even as this is the last of those leader level summits, today, we agreed to maintain a strong architecture, including through the you united nations, International Atomic agency and inter to carry on the work that is needed to continue this mission. We are creating a knew nuclear contact group, senior level experts from more than 30 of our countries that will meet regularly to preserve the cooperation weve built, to institutional lies this work and to keep driving progress for years to come. At our session on isil this afternoon, there was widespread agreement that defeating terrorist groups requires more information sharing. Everybody understands the urgency in the wake of what has happened in brussels, turkey, pakistan and so many other countries around the world. National intelligence, jim clapper, is continuing to engage with the european partners, and today, i invited all the nations represented at this summit to join a broader discussion among our intelligence and Security Services on how we can improve information sharing within and among our nations to prevent all manner of terrorist attacks, especially those that might involve weapons of mass destruction. In closing, i just want to say that preventing Nuclear Terrorism is one part of the broader agenda that i outlined seven years ago in prague. In recent days, there has been no shortage of analysis on whether weve achieved our vision, and im the first to acknowledge the great deal of work that remains from negotiating further reductions with russia to dealing with north Koreas Nuclear program. As i indicated in prague, will not happen quickly and perhaps not in my lifetime, but weve begun. The United States and Russian Nuclear is on track to be the lowest in six decades. Ive reduced the number of Nuclear Weapons in our Nuclear Strategy in an historic deal, we have prevented Nuclear Weapons to iran. An International Fuel bank is being built to promote civil cooperation. Im extremely proud of our record across the board. Were going to keep pushing forward where ever we can, as i hope future administrations do to bring us closer to the day when these Nuclear Dangers no longer hangover the heads of our children and our grandchildren. With that, let me take a few questions, and im going to start with roberta ramton from route teres. I want to ask about iran. Iran Supreme Leader has complained he has not been getting business deals. Nonu. S. Companies are saying its hard or impossible to do much business with iran without at some point accessing the u. S. Financial system to do u. S. Dollar denominated transactions. So my question is, are you considering allowing such transactions, and if so, is that not a betrayal of your assurances that most u. S. Sanctions would stay in place . Thats not taking. So let me say broadly that so long as iran is carrying out its end of the bargain, we think its important for the World Community to carry out our end of the bargain. They have in fact, based on the presentations that were made by the i. E. A. This morning to the p5 plus 1 have in fact followed the implementation steps that were laid out. And as a consequence, sanctions related to their Nuclear Program have been brought down. Part of the challenge that they face is that companies havent been doing business there for a long time. And they need to get comfortable with the prospects of this deal holding. One of the things that secretary lu and his counterparts p5 plus 1, providing clarity about what transactions are allowed. Its going to take time over the next several months for companies and their legal departments to feel confident that in fact, there may not be risks of liability if they do business with iran. So some of the concerns that iran has expressed, we are going to work with them to address. It is not necessary that we take the approach of them going through dollar denominated transactions. It is possible for them to work through european Financial Institutions as well. But there is going to need to be continued clarification provided to businesses in order to for deal flows to begin. Now what i would say is also important is irans own behavior in generating confidence that iran is a safe place do business. You know, in a deal like this, my first priority, my first concern was making sure that we got their Nuclear Program stopped, and material that they already had that would give them a very short breakout capacity that that was shipped out. That has happened. And i always said that i could not promise that iran would take advantage of this opportunity and this window to reenter the International Community. Iran so far has followed the letter of the agreement. But the spirit of the agreement involves iran also sending signals to the World Community and businesses that it is not going to be engaging in a range of provocative actions that might scare business off. When they launch Ballistic Missiles with slogans calling for the destruction of israel, that makes businesses nervous. There is some geopolitical risk that is heightened when they see that taking place. If iran continues to ship missiles to hezbolah, so part of what i hope happens, we have a responsibility to provide clarity about the rules that govern, so that iran can in fact benefit the iranian people from an improved economic situation. But iran has to understand what every country in the world understands. Businesses want to go where they feel safe, where they dont see massive controversy. Where they can be confident that transactions are going to operate normally, and thats an adjustment that iran is going to have to make as well. Frankly, within iran, i